Event source mapping parameters - AWS Lambda
This documentation is a draft for private preview for regions in the AWS European Sovereign Cloud. Documentation content will continue to evolve. Published: January 2, 2026.

Event source mapping parameters

All Lambda event source types share the same CreateEventSourceMapping and UpdateEventSourceMapping API operations. However, only some of the parameters apply to Amazon MQ and RabbitMQ.

Parameter Required Default Notes

BatchSize

N

100

Maximum: 10,000

Enabled

N

true

 none

FunctionName

Y

 N/A none

FilterCriteria

N

N/A

Control which events Lambda sends to your function

MaximumBatchingWindowInSeconds

N

500 ms

Batching behavior

Queues

N

 N/A

The name of the Amazon MQ broker destination queue to consume.

SourceAccessConfigurations

N

 N/A

For ActiveMQ, BASIC_AUTH credentials. For RabbitMQ, can contain both BASIC_AUTH credentials and VIRTUAL_HOST information.